Yet another possible change in Ubuntu's core components: they're mulling over replacing GDM with LightDM. Why? Well: "Faster - the greeter doesn't require an entire GNOME session to run. More flexible - multiple greeters are supported through a well defined interface. This allows Ubuntu derivatives to use the same display manager (e.g. Kubuntu, Lubuntu etc.). Simpler codebase - similar feature set in ~5000 lines of code compared to 50000 in GDM. Supports more usecases - first class support for XDMCP and multihead."

...Many of the changes proposed for Ubuntu are poorly conceived and not very well executed....

How can proposed changes not be well executed? They are "proposed".

If you look at Android, it's linux without X. OSX is BSD Unix, without X. This is the same direction Ubuntu is taking. Why did others dump X, because they don't need it for their audience. I'm not against X. I want X to stay on my box. But, I want it on Ubuntu the same way it is on my MBP, not required for basic window and mouse functionality.